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. M. B. DODGE.

Ore Crusher.

No. 60,154. Pate med Dec. 4,1866.

Witnesses:

Inventor.

Quint tatzs gem: {fir-2'.

IMPROVEMENT IN ORECRUSHERS.

SPECIFICATION.

TO ALL WHOM IT MAY CONCERN:

Be it known that I, M. B. DODGE, of the city, county, and State of New York, have invented a new and useful Improvement in Quartz Crushers; and Ido lierebyde'clare that the followingisa full, clear, and exact description thereof, which will enable others skilled in the art to make and use the same, reference being had to the accompanying drawings, forming part of this specification, in which Figure 1 represents a longitudinal section of this invention.

Figure 2 is a plan or top view of the same.

Similar letters of reference indicate like parts.

This invention consists in the applicationof soft wrought-iron plates to the working faces of a quartz crusher, in such a manner that if a hammer, chisel, or other rigid substance, passes inbetween the jaws of the crusher,

the working faces of the jaws will indent suflieiently to permit said rigid substances to pass without injury to the machine, and furthermore, the soft wrought-iron faces are enabled to hug the-lumps of quartz, thus preventing them from slipping, and eausing'them to be crushed withgreat rapidity.

A represents a quartz crusher with a stationary jaw, B, and a movable jaw, 13, to which an oscillating motion is imparted by-siiitable mechanism. The working faces of the jaws B B are protected by soft wrought-iron plates at a, whidh are secured to the same by screws or other suitable means.

The great advantage of these soft iron faces over chilled or steel faces is that the same will be indented when a hammer, chisel, or other rigid substance, passes through between them", and injury to the machine will be prevented, whereas with hard, chilled, or steel faces, the machine must break if a rigid substance gets between the crushing jaws. My soft iron jaws have also another "great advantage, viz, they take hold of the lamps of quartz and prevent thein from slipping, and thereby the crushing operation is materially facilitated;

What I claim as new, and desire to secure by Letters Patent, is-- The application of soft wroiight-iron faces ,to the jaws of a quartz crusher, substantially as and for the Purpose described. We

MILES B. DODGE.

Witnesses:

M. hLLivmesron,

W. HAUFF. 

